The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 1998
Filed:
Feb. 18, 1997
Ulrich Bahr, Brunswick, DE;
Michael Daetz, Tiddische, DE;
DAUG Deutsche Automobilgesellschaft mbH, Brunswick, DE;
Abstract
An electronic ignition system for an internal combustion engine is so controlled that an ignition current or secondary current caused by an ignition spark at the respective spark plug in the secondary coil of an ignition transformer is evaluated for initiating, if necessary, follow-up charges of the primary coil to thereby generate further ignition impulses. The initial loading or charging impulse is provided by a respective control circuit. The total sparking time at the respective spark plug thus corresponds to a sequence of individual impulses, each of which causes an ignition spark. The detection of the ignition current in the secondary coils is performed with an ignition current measuring circuit arrangement connected to the secondary coils. This measuring circuit (SC) generates a signal representing the secondary or ignition current represented as a voltage drop across a measuring resistor (R.sub.2). The voltage drop signal is supplied to an evaluating circuit which in turn generates a follow-up loading signal in response to the result of the evaluation of the measured voltage drop signal.